Lock-nut and bolt.



T. J. JUZBK. LOOK NUT AND BOLT,

APPLICATION FILED JULY 8,1914.

1,119,613. Patented De0.1,1914.

7ZZZ77665635/ j? #672157",

777a? J zzzic fv THOMAS J. JUZEK, OF ELGIN, ILLINOIS.

LOCK-NUT AND BOLT.

Specification of Letters Eatent.

Patented Dec. 1, 1914.

Application filed July 3, 1914. Serial No. 848,786.

To all whom it may concern Be it known that I, THOMAS J. JUzEK, acitizen of the United States, residing at Elgin, in the county of Kaneand State of Illinois, have invented certain new. and usefulImprovements in Lock-Nuts and Bolts, of which the following is aspecification.

The present invention has reference to certain improvementsin lock nutsand bolts of that type in which a cotter pin or the like is insertedthrough a hole in the end portion of the bolt, said cotter pincooperating with slots or projections on the nut in order to preventrotation of the same. In this class of bolt the cotter hole is coveredover or hidden by the projections or lugs of the nut as the nut isrotated, and in order-to insert the cotter pin it is, necessary to bringthe nut into exactly the proper position so that the cotter hole willregister with the slots or openings of the nut. On account of the abovementioned feature, this class of lock nut is open to the objection that.sometimes it is very difiicult to register up the slots of the nut withthe cotter hole of the bolt, and until this is done the cotter pincannot be set into place. This difficulty or objection is all the morepronounced when the bolt is used in locations where it cannot be readilymanipulated.

One of the objects of the present invention is to so form the endportion of the bolt that the operator will have an indication as to thedirection in which the cotter hole extends, so that when looking at theends of the bolt and nut the operator will know when a; pair of slots ofthe nut has been brought into registry with the hole in the bolt;-and sothat the operator can ascertain the direction in which the cotter pinshould be inserted.

Another object of the invention is to so form the aforementionedindicating means that said means may be used for holding the boltagainst rotationwhen the nut is being tightened up or loosened. Itfrequently happens that the nut and bolt thread together so tightly thatsome extraneous force must be applied to the bolt to retain the sameagainst rotation.

One of the objects of the present inven& tion is to so form theindicating means that it may be used to retain the bolt against rotationunder these circumstances, or if desired, to use said indicating meansfor the purpose. of rotating the bolt.

Other objects and uses will appear from a detailed description of theinvention which consists in the features of construction andcombinations of parts hereinafter described and claimed.

In the drawings: Figure 1 shows a side View of a bolt to which. the nuthas been applied, the cotter pin hole and indicating means facing theobserver; Fig. view corresponding to 1, a cotter pin having-beeninserted in place; Figs. 3. and 5 are side views of modified formsof bolts; and Figs. 4 and 6 are end iews corresponding to the views ofFigs. 3 and 5' respectively.

In each of the three illustrated forms the numeral 7 designatesthe'bolt. In each case the bolt is provided with a cotter pin hole 8adjacent to its threaded end, said holes being for the reception ofcotter pins or the like 9. The illustrated form of lock nut 10 isprovided with a plurality .of outstanding lugsor. the like 11 betweenwhich are the slots 12. The lugs 11 are so formed that;the slots 12stand in diametrically opposite pairs, so that as the nut is rotated thepairs of slots will successively come opposite to the ends of the cotterhole 8 to allow the cotter pin to be set into place as illustrated inFigs. 2, 4, and 6.

It will be observed that the locking function between the lugs 11 andthe cotter pin will not be secured exceptwhen the nut stands at such aposition on the bolt that the hole 8' is at least partially covered bythe lugs 11 in the rotation of the nut. Ordinarily the nut will stand orbe threaded into such a position that the lugs ll'will com-- pletelycover over or hide the cotter hole as the nut is rotated. Under thesecircumstances the operator will not observe the cotter hole as the nutis-rotated unless he happens to view the nut from such a position thatthe hole can be seen by looking through one of the slots 12 as the nutis rotated. If it is necessaryfor the operator to place the cotterpin'while observing the end of the bolt it will be impossible for him tofind the cotter pin hole and insert the cotter 7 pin except as amatter-0f chance or by holding the end of the cotter pin seated withinone of the slots and then rotating the nut for approximately one-halfrevolution. This operation is generally impracticable, particularlywhere the nut is to be drawn up tight.

2 is an end In the arrangement shown in Figs. 1 and 2 I provide a slot13 across the end of the bolt, and in alinement with the cotter pinhole. This slot may be readily viewed from the end of the bolt as shownin Fig. 2, so that the operator can readily ascertain the direction ofthe hole for the purpose of properly alining a pair of slots with it,and then for the purpose of inserting the cotter pin. In this formofconstruction the slot 13 may be also used for the reception of a screwdriver or'other tool for the purpose of holding the bolt incase the nutshould bind with undue friction. In the arrangement shown in Figs. 3 and4 the indicating means takes the form of a rib or the like l-l extendingin the direction of the cotter hole and takingthe place of the slot 13of the previous arrangement. On the other hand, in the arrangement shownin Figs. 5 and 6 the indicating means takes the form of a pair of holesor sockets l5 and 16 which are formed in the bolt over the ends of thecotter hole, the holes 15 and 16 likewise. giving an indication andserving as a means to prevent rotation of the bolt.

I am aware of the fact that look nuts have long been used in associationwith bolts to which they are locked by means of cotter pins or the like,and I do not claim this broad combination as a matter of invention with.me. But I do claim the provision of indicating means .on the end of thebolt for giving an indication as to the direction in which the cotterhole extends, and also such an indicating means as the foregoing whenthe same is peculiarly adapted for use in connection or combination witha proper tool to prevent rotation of the bolt.

I claim:

1. As a new article of manufacture a bolt having a cotter hole formedthrough its end portion and having a slot formed in its end portionparallel to and in alinement with the cotter hole, substantially as andfor the purpose set forth.

2. As a new article of manufacture a bolt having acotter hole extendingthrough its end portion and having visual means on its extreme end forindicating the position and direction of the cotter hole, substantiallyas and for the purpose set forth.

3. The combination with a .bolt having a cotter hole extending throughits end portion and visual means on its extreme end for indicating theposition and direction of the cotter hole, of a nut threadedonto thebolt, said nut being provided with a plurality of outstanding lugshaving diametrically opposite slots therebetween for the reception of acotter pin which extends through the cotter hole, substantially as andfor the purpose set forth.

THOMAS J. JUZEK;

Witnesses:

THOMAS A. BANKING, Jr., FRANCES-M. FRos'r.

